CN212115663U - Full-gamut moving-coil loudspeaker unit and sound box device using same - Google Patents
Full-gamut moving-coil loudspeaker unit and sound box device using same Download PDFInfo
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- CN212115663U CN212115663U CN202021116128.1U CN202021116128U CN212115663U CN 212115663 U CN212115663 U CN 212115663U CN 202021116128 U CN202021116128 U CN 202021116128U CN 212115663 U CN212115663 U CN 212115663U
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- 239000000178 monomer Substances 0.000 claims abstract description 18
- 230000001174 ascending effect Effects 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 230000004323 axial length Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 25
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003534 oscillatory effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model discloses a full gamut moving coil loudspeaker monomer and utilize its audio amplifier device. The loudspeaker monomer is provided with a voice coil, a magnet, a washer gasket and a magnetic conduction column, wherein the magnetic conduction column is positioned inside the voice coil, the magnet is positioned outside the voice coil, the washer gasket is attached to the upper surface of the magnet, the axial length of the voice coil in the magnetic conduction column is smaller than that of each washer gasket in the axial direction of the magnetic conduction column, the washer gasket is provided with an upper ring surface, an outer ring surface, a bottom ring surface and an inner ring surface, the upper ring surface is provided with a first platform ring surface, a first inclined ring surface, a first vertical ring surface and a second platform ring surface which are adjacent in pairs from the inner side to the outer side of the washer gasket, and the outer ring surface is provided with a second inclined ring surface. The sound pressure is enhanced and the distortion is reduced through magnetic loop optimization and voice coil design.
Description
Technical Field
The present invention relates to a speaker unit, and more particularly to a full-range moving-coil speaker unit with optimized magnetic circuit.
Background
The design of a general moving coil loudspeaker single body magnetic force system mainly comprises a voice coil design and a magnet design. In terms of voice coil design, the voice coil is mainly divided into a long voice coil (overlapping coil) design and a short voice coil (underswing coil) design. Referring to fig. 1a and fig. 1b together, wherein fig. 1a is a schematic cross-sectional view of a conventional driving structure of a long voice coil speaker unit, which includes a voice coil 11, a magnet 12, a washer 13 and a flux post 14, wherein a length of the voice coil 1 in an axial direction of the flux post 14 is greater than a length of the washer 13 in the axial direction of the flux post 14; fig. 1b is a schematic cross-sectional view of a conventional driving structure of a short-voice-coil speaker unit, which includes a voice coil 21, a magnet 22, a washer 23 and a magnetic pillar 24, wherein the length of the voice coil 21 in the axial direction of the magnetic pillar 24 is smaller than the length of the washer 23 in the axial direction of the magnetic pillar 24.
The design of the long voice coil is suitable for the loudspeaker single body with larger stroke requirement, the trend of the BL curve is more like the trend of a mountain peak, wherein B is a magnetic field, and L is the length of the coil, so that the advantages of smaller inductance value and better high-frequency trend can cause larger low-frequency distortion, and the long voice coil is more suitable for the loudspeaker single body with the oscillation starting frequency of more than 200 Hz; the design of the short voice coil ensures that the voice coil is kept in a magnetic gap range in the motion of the piston, namely ensures that the voice coil vibrates in a linear range so as to avoid low-frequency distortion caused by uneven distribution of a magnetic field in the magnetic gap, but the short voice coil has larger inductance value and poorer high-frequency trend.
The magnet design aspect mainly includes the design of internal magnet type magnet and the design of external magnet type magnet. The external magnet structure is characterized in that the magnet is located outside the voice coil, as shown in fig. 1a and 1 b. The external magnetic magnet structure is not limited by size, and when the magnetic force is insufficient, the sizes of the washers 13 and 23 and the magnets 12 and 22 can be adjusted freely. In addition, a general bass unit can adopt an external magnetic design. Referring to fig. 1c, a cross-sectional view of a driving structure of a conventional internal magnet speaker unit is shown, which includes a voice coil 31, a magnet 32, a washer 33 and a magnetic conductive plate 34, wherein the magnet 32 is located inside the voice coil 31. The internal magnet design has the advantages of small size and low cost, but the size is limited, and the internal magnet design is generally applied to long voice coil designs.
In addition, the distortion factor of the speaker unit is mainly the nonlinear displacement of the voice coil. The following is an analysis of the voice coil nonlinear displacement:
1. please refer to fig. 2a, which shows a distribution diagram of the magnetic force factor of the conventional speaker unit to the displacement of the voice coil. As shown in fig. 2a, the magnetic force factor has a peak at a displacement x of 0.
2. The magnetic force F ═ bl (x) i excites the mechanical system, depending on the displacement x of the voice coil, which produces a nonlinear interaction voltage (electromotive force EMF) of the voice coil current and the displacement x on the electrical side of the electrodynamic transducer, i.e. u ═ bl (x) iEMFBlx (x) v, wherein uEMFTo induce an electromotive force, v is the displacement velocity of the voice coil.
3. The peak displacement Xmax 10% of the voice coil is an important parameter for evaluating the mechanical properties of the transducer, which limit the sound reproduction at low frequencies, and is defined according to IEC standard 62458 as the peak displacement of the voice coil. When the voice coil generates the peak displacement, the maximum value of the total harmonic distortion or the modulation distortion reaches a defined threshold value d which is 10%. Referring to FIG. 2b, a diagram of the magnetic force factor of a conventional speaker unit versus the displacement of the voice coil is shown to obtain a peak displacement XBlSchematic representation of (a). As shown in FIG. 2b, the peak displacement is X when the magnetic force factor is reduced to 82% of the rest positionBl。
4. The main source of distortion on the hearing of the horn unit is odd harmonic distortionIn particular third harmonic distortion, which can be expressed as
Wherein d ish3Represents third harmonic distortion, y (nf) represents the size of the nth harmonic, and n is 1 to k.
In addition, the sound cone support arranged on the driving structure of the loudspeaker unit also influences the sound performance of the loudspeaker unit. Referring to fig. 3, a cross-sectional view of a conventional short voice coil and external magnetic speaker unit is shown. As shown in fig. 3, the speaker unit includes a voice coil 41, a magnet 42, a washer 43, a magnetic pole 44, a cone support 45, an aluminum paper tube 46 and a fixed core support 47, wherein the cone support 45 is attached to the upper surface of the washer 43. However, the horn unit has the following disadvantages:
1. the adhesion area between the cone support 45 and the washer 43 is too small, which may affect the stability of adhesion and lack of positioning manner and space.
2. Due to the small-area adhesion manner of the cone support 45 and the washer 43, the length of the fixed core support piece 47 is insufficient, so that the left-right swing of the voice coil 41 cannot be effectively inhibited, the mechanical linear smoothness required by the up-down vibration of the voice coil 41 is provided, and abnormal sound is easily caused; on the other hand, if the upper surface area of the washer 43 is increased to increase the length of the stator 47, the magnetic field cannot be optimized, and the sound pressure is lost.
3. The thickness of the cone support 45 will displace the thickness of the magnets 42 and washers 43, i.e. if the individual design requirement displacement is d, then in case a predetermined thickness is required: 1) if the cone support 45 is arranged on the washer 43, the thicknesses of the magnet 42 and the washer 43 are squeezed; 2) if the cone support 45 is arranged outside the washer 43, the distance from the fixed core support piece 47 to the washer 43 needs to be added with a vibration amount d, and the thicknesses of the magnet 42 and the washer 43 are similarly extruded; 3) if the thickness of the cone holder 45 is calculated within the displacement d, the magnetic field in the vertical movement range of the voice coil 41 becomes uneven, and distortion occurs. 4) Apart from the requirement of a single body with a predetermined thickness, the length of the voice coil assembly (including the voice coil 41 and the voice coil Bobbin (Bobbin)) is relatively long due to the thickness of the voice coil support 45, i.e. the rotational inertia of the vibrating componentWill increase and thereby decrease the resonant frequency of the rocking mode. However, the reduction of the resonant frequency of the oscillatory mode is undesirable because the resonant frequency of the oscillatory mode is reduced to be close to the start frequency f0However, since the amplitude near the start-up frequency point is relatively large, the oscillation mode is likely to be triggered to generate abnormal noise.
From the above analysis, it can be known that optimizing the bl (x) curve is an important factor for reducing the sound distortion of the speaker unit, and the arrangement of the cone support also affects the sound distortion. Therefore, how to optimize the Bl (x) curve with a compact monomer structure is an important issue in the art.
In order to solve the above problems, there is a need in the art for a novel horn unit structure.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a loudspeaker monomer, its accessible wedge china department gasket optimizes the distribution of magnetic force factor to the voice coil loudspeaker voice coil displacement.
Another object of the utility model is to provide a loudspeaker unit, its accessible is equipped with the wedge china department gasket of a plurality of support anchor points and makes things convenient for being connected of sound basin support and drive structure.
Another object of the present invention is to provide a speaker unit, the wedge washer spacer of its accessible that is equipped with a plurality of support anchor points reduces the whole height of monomer by a wide margin to effectively reduce the probability that the speaker takes place the swing mode.
In order to achieve the above object, a speaker unit is provided, which has a voice coil, a magnet, a washer and a magnetic pillar, wherein the magnetic pillar is located inside the voice coil, the magnet is located outside the voice coil, the washer is attached to the upper surface of the magnet, the length of the voice coil in the axial direction of the magnetic pillar is smaller than the length of the washer in the axial direction of the magnetic pillar, and the speaker unit includes:
the washer gasket is provided with an upper ring surface, an outer ring surface, a bottom ring surface and an inner ring surface, wherein the upper ring surface is provided with a first platform ring surface, a first inclined ring surface, a first vertical ring surface and a second platform ring surface which are adjacent in pairs from the inner side to the outer side of the washer gasket, and the outer ring surface is provided with a second inclined ring surface.
In one embodiment, the inner ring surface is provided with a bevel ring surface and a fifth vertical ring surface which are adjacent to each other in pairs from the lower part to the upper part of the washer pad.
In one embodiment, the upper ring surface is further provided with a second vertical ring surface and a third platform ring surface continuously outside the second platform ring surface, and the outer ring surface is provided with a third vertical ring surface, a fourth platform ring surface, a fourth vertical ring surface and the second inclined ring surface which are adjacent to each other in pairs from the top to the bottom of the washer gasket.
In an embodiment, the speaker unit further has a cone support connected to the washer pad.
In order to achieve the foregoing objective, the utility model also provides an audio amplifier device, it has an at least speaker monomer and is used for the drive an at least free drive circuit of speaker, each the speaker monomer all has a voice coil loudspeaker voice coil, a magnet, a china department gasket and a magnetic conduction post, and wherein, this magnetic conduction post is located inside this voice coil loudspeaker voice coil, and this magnet is located this voice coil loudspeaker voice coil outside, the attached upper surface at this magnet of china department gasket, this voice coil loudspeaker voice coil are less than at the ascending length of the axial of this magnetic conduction post china department gasket is at the ascending length of the axial of this magnetic conduction post, and include:
the washer gasket is provided with an upper ring surface, an outer ring surface, a bottom ring surface and an inner ring surface, wherein the upper ring surface is provided with a first platform ring surface, a first inclined ring surface, a first vertical ring surface and a second platform ring surface which are adjacent in pairs from the inner side to the outer side of the washer gasket, and the outer ring surface is provided with a second inclined ring surface.
In one embodiment, the inner ring surface is provided with a bevel ring surface and a fifth vertical ring surface which are adjacent to each other in pairs from the lower part to the upper part of the washer pad.
In one embodiment, the upper ring surface is further provided with a second vertical ring surface and a third platform ring surface continuously outside the second platform ring surface, and the outer ring surface is provided with a third vertical ring surface, a fourth platform ring surface, a fourth vertical ring surface and the second inclined ring surface which are adjacent to each other in pairs from the top to the bottom of the washer gasket.
In an embodiment, the speaker unit further has a cone support connected to the washer pad.
Drawings
Fig. 1a is a schematic cross-sectional view of a driving structure of a conventional long voice coil speaker unit.
Fig. 1b is a schematic cross-sectional view of a conventional driving structure of a short-voice-coil speaker unit.
Fig. 1c shows a schematic sectional view of a driving structure of a conventional internal magnet type horn unit.
Fig. 2a shows a distribution of the magnetic force factor of a conventional horn unit versus the displacement of the voice coil.
FIG. 2b is a graph showing a peak displacement obtained from a magnetic force factor of a conventional speaker unit versus the displacement of the voice coil.
Fig. 3 is a schematic cross-sectional view of a conventional short voice coil, external magnetic speaker unit.
Fig. 4 is a schematic cross-sectional view of a driving structure of an embodiment of the speaker unit according to the present invention.
Fig. 5 is a diagram showing a comparison of the distribution of the magnetic force factor between the driving structure of the speaker unit according to an embodiment of the present invention and the driving structure of a conventional speaker unit, with respect to the displacement of the voice coil.
Fig. 6a is an exploded view of an embodiment of the speaker unit of the present invention.
Fig. 6b is a combination diagram of an embodiment of the speaker unit of the present invention.
Fig. 7 is a block diagram of an embodiment of the speaker device of the present invention.
Detailed Description
For a further understanding of the structure, features, objects, and advantages of the invention, reference should be made to the drawings and detailed description of preferred embodiments.
The utility model discloses the free principle of speaker lies in through the shape of design magnificent department in order to optimize Bl (x) curve and provide the combination, the setpoint of sound basin support simultaneously to the realization is with the free Bl (x) curved target of a succinct monomer structure optimization speaker. Furthermore, the utility model discloses a speaker monomer must still can reach full gamut, low distortion and the good effect of efficiency. In order to reach the effect of low distortion, the utility model discloses a short voice coil loudspeaker voice coil design lets the voice coil loudspeaker voice coil vibration can be in linear range. In order to achieve the effect of full range, the utility model discloses set up the oscillation frequency at about 100 Hz. In addition, because the design of short voice coil loudspeaker voice coil can produce great inductance value, lead to the high frequency trend relatively poor, in order to improve high frequency response, the utility model discloses an add the copper ring in the magnetic gap and reduce inductance value. In addition, because in the magnetic gap in addition the copper ring can cause the magnetic gap to increase and make magnetic force BL reduce, consequently, the utility model discloses an adopt the design of outer magnetism formula to increase magnetic force with the magnet through the outer loop.
That is, the utility model discloses a speaker monomer is under the condition of limited thickness, adopts outer magnetic formula, short voice coil and increases the structure of copper ring, then designs the appearance shape of china department gasket in order to optimize the Bl (x) curve of speaker monomer. According to the optimized simulation result of the simulation software, the appearance of the washer of the speaker unit of the present invention is substantially wedge-shaped. Fig. 4 is a schematic cross-sectional view of a driving structure of an embodiment of the speaker unit of the present invention. As shown in fig. 4, a driving structure 100 includes a voice coil 110, a magnet 120, a washer 130 and a magnetic pillar 140, wherein the magnetic pillar 140 is located inside the voice coil 110, the magnet 120 is located outside the voice coil 110, the washer 130 is attached to the upper surface of the magnet 120, and the length of the voice coil 110 in the axial direction of the magnetic pillar 140 is smaller than the length of the washer 130 in the axial direction of the magnetic pillar 140.
The washer shim 130 has an upper ring surface, an outer ring surface, a bottom ring surface 133 and an inner ring surface, wherein the upper ring surface is provided with a first platform ring surface 131a, a first inclined ring surface 131b, a first vertical ring surface 131c, a second platform ring surface 131d, a second vertical ring surface 131e and a third platform ring surface 131f which are adjacent to each other in pairs from the inner side to the outer side of the washer shim 130; the outer ring surface is provided with a third vertical ring surface 132a, a fourth platform ring surface 132b, a fourth vertical ring surface 132c and a second inclined ring surface 132d which are adjacent to each other from the upper part to the lower part of the washer 130; and a bevel ring surface 134a and a fifth vertical ring surface 134b which are adjacent to each other in pairs are arranged on the inner ring surface from the lower part to the upper part of the washer gasket 130.
According to the design, the utility model discloses a free drive structure of speaker can obtain the distribution of the magnetic force factor to the voice coil loudspeaker voice coil displacement of optimizing. Referring to fig. 5, a diagram showing a distribution comparison of magnetic force factor between an embodiment of the driving structure of the speaker unit and a driving structure of a conventional speaker unit to displacement of the voice coil is shown, wherein the diameter of the speaker unit of the embodiment of the present invention is about 50 mm, and the total length of the voice coil is about 4.5 m. As shown in fig. 5, the single magnetic force factor of the speaker of the present invention has a flat plateau region to the distribution of the voice coil displacement, and the average magnetic field strength in the magnetic gap is improved by about 7% and more uniformly than the average magnetic field strength in the magnetic gap of the existing speaker, so as to provide the effects of full range, low distortion and good efficiency.
In addition, according to the design of the driving structure of fig. 4, the washer 130 surrounding the periphery of the voice coil 110 may have a structure that not only optimizes the distribution of the magnetic force factor to the voice coil displacement, but also provides positioning points to facilitate the connection of the driving structure with the voice cone support. Please refer to fig. 6a and fig. 6b, which respectively show an exploded view and a combined view of an embodiment of the speaker unit of the present invention. As shown in fig. 6a and 6b, the speaker unit of the present invention can greatly reduce the height of the speaker unit by connecting a cone support 200 with the driving structure 100 due to the wedge structure of the washer pad 130 attached with the supporting positioning point, thereby reducing the height of the aluminum paper tube to effectively reduce the probability of the speaker generating the swing mode.
According to the above description, the present invention further provides a speaker device. Fig. 7 is a block diagram of an embodiment of a speaker device according to the present invention. As shown in fig. 7, a speaker device 300 has at least one speaker unit 310 and a driving circuit 320 for driving the at least one speaker unit 310, wherein the speaker unit 310 is implemented by the speaker units shown in fig. 4 to 6 b.
As can be seen from the above description, the present invention has the following advantages:
1. the utility model discloses a distribution of magnetic force factor to the voice coil loudspeaker voice coil displacement is optimized to a wedge china department gasket of speaker monomer accessible.
2. The utility model discloses a wedge china department gasket that speaker monomer accessible was equipped with a plurality of support setpoint makes things convenient for being connected of sound basin support and drive structure.
3. The utility model discloses a wedge china department gasket that speaker monomer accessible was equipped with a plurality of support setpoint reduces monomeric whole height by a wide margin to effectively reduce the probability that the speaker took place the swing mode.
It should be emphasized that the above-described embodiments are disclosed as preferred embodiments, and that various modifications and alterations, which are obvious to a person skilled in the art and which are derived from the technical idea of the present invention, may be made without departing from the scope of the appended claims.
In conclusion, no matter the purpose, means and effect, the scheme shows that the method is different from the prior art, and the method is suitable for practical application and really meets the patent requirements of the utility model.
Claims (8)
1. The utility model provides a loudspeaker monomer, its has a voice coil loudspeaker voice coil, a magnet, a china department gasket and a magnetic conduction post, and wherein, this magnetic conduction post is located inside this voice coil loudspeaker voice coil, and this magnet is located this voice coil loudspeaker voice coil outside, the china department gasket is attached in the upper surface of this magnet, and this voice coil loudspeaker voice coil is less than each in the ascending length of the axial of this magnetic conduction post china department gasket at the ascending length of the axial of this magnetic conduction post, and its characterized in that:
the washer gasket is provided with an upper ring surface, an outer ring surface, a bottom ring surface and an inner ring surface, wherein the upper ring surface is provided with a first platform ring surface, a first inclined ring surface, a first vertical ring surface and a second platform ring surface which are adjacent in pairs from the inner side to the outer side of the washer gasket, and the outer ring surface is provided with a second inclined ring surface.
2. The speaker cell as claimed in claim 1, wherein the inner ring surface has a chamfered ring surface and a fifth vertical ring surface adjacent to each other in pairs from the bottom to the top of the washer pad.
3. The speaker cell of claim 2, wherein the upper ring surface further comprises a second vertical ring surface and a third platform ring surface continuously disposed on the outer side of the second platform ring surface, and the outer ring surface comprises a third vertical ring surface, a fourth platform ring surface, a fourth vertical ring surface and the second inclined ring surface, which are adjacent to each other from the top to the bottom of the washer pad.
4. The speaker unit as claimed in claim 1, further comprising a cone support connected to the washer pad.
5. The utility model provides a sound box device, its have at least one speaker monomer and be used for driving a drive circuit of at least one speaker monomer, each speaker monomer all has a voice coil loudspeaker voice coil, a magnet, a china department gasket and a magnetic conduction post, and wherein, this magnetic conduction post is located inside this voice coil loudspeaker voice coil, and this magnet is located this voice coil loudspeaker voice coil outside, the china department gasket is attached in the upper surface of this magnet, and this voice coil loudspeaker voice coil is less than at the ascending length of the axial of this magnetic conduction post china department gasket at the ascending length of the axial of this magnetic conduction post, and its characterized in that:
the washer gasket is provided with an upper ring surface, an outer ring surface, a bottom ring surface and an inner ring surface, wherein the upper ring surface is provided with a first platform ring surface, a first inclined ring surface, a first vertical ring surface and a second platform ring surface which are adjacent in pairs from the inner side to the outer side of the washer gasket, and the outer ring surface is provided with a second inclined ring surface.
6. The sound box assembly of claim 5, wherein the inner ring surface has a bevel ring surface and a fifth vertical ring surface that are adjacent to each other in pairs from the bottom to the top of the washer pad.
7. The sound box assembly of claim 6, wherein the upper ring surface further comprises a second vertical ring surface and a third platform ring surface continuously disposed on the outer side of the second platform ring surface, and the outer ring surface comprises a third vertical ring surface, a fourth platform ring surface, a fourth vertical ring surface and the second inclined ring surface, which are adjacent to each other from the top to the bottom of the washer pad.
8. The speaker arrangement of claim 5, wherein the speaker unit further has a cone support connected to the washer spacer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW109203672 | 2020-03-30 | ||
| TW109203672U TWM598577U (en) | 2020-03-30 | 2020-03-30 | Full-range moving coil speaker unit and speaker device using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212115663U true CN212115663U (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021116128.1U Active CN212115663U (en) | 2020-03-30 | 2020-06-16 | Full-gamut moving-coil loudspeaker unit and sound box device using same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN212115663U (en) |
| TW (1) | TWM598577U (en) |
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2020
- 2020-03-30 TW TW109203672U patent/TWM598577U/en unknown
- 2020-06-16 CN CN202021116128.1U patent/CN212115663U/en active Active
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| Publication number | Publication date |
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| TWM598577U (en) | 2020-07-11 |
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